***The following notes are taken directly from –Succession and stability, Chapter 20 of Ecology: Concepts and Applications, 5th edition, by Manuel C. Molles Jr.***
CHAPTER 20: SUCCESSION AND STABILITY
*Succession is the change in plant, animal, and microbial communities in an area folloiwng disturbance or the creation of new substrate
*A pioneer community is the first plants in a successional sequence.
*Primary succession is the change in an ecological environment’s organisms–over time–which begins (solely) on newly formed volcanic surfaces such as lava flows.
*Secondary succession is the change in an ecological environment’s organisms–over time–which occurs after a distrubance of some sort (either due to natural disaster or human influence); there is soil and some organisms present.
*A climax community is a community which comes late in the successional process–the populaiton of which remains stable until disrupted by disturbance.
*Community changes during succession include increases in species diversity and changes in species composition.
*Ecosystem changes during succession include increases in biomass, primary production, respiration, and nutrient retention.
*Mechanisms that drive ecological succession include facilitation, tolerance, and inhibition.
*Community stability may be due to lack of disturbance or community resistance or resilience in the face of distrubance.
*Stability is the absence of change.
*Resistance is the ability of a community or ecosystem to maintain structure and/or function in the face of disturbance.
*Resilience is the ability of a community or ecosystem to bounce back after a disturbance.